123 lines
3.1 KiB
Markdown
123 lines
3.1 KiB
Markdown
---
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title: "Websocket 查看实时日志"
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date: 2019-10-30T11:43:23+08:00
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lastmod: 2019-10-30T11:43:23+08:00
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tags: ["websocket"]
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categories: ["web"]
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---
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## 操作系统
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- CentOS7
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## 下载 websocketd
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- [websocketd-0.3.0-linux_amd64.zip](https://github.com/joewalnes/websocketd/releases/download/v0.3.0/websocketd-0.3.0-linux_amd64.zip)
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## 安装 nc 命令
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```bash
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yum install nmap-ncat
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```
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## 创建监听脚本
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```bash
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cat > cmd.sh <<-END
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##!/bin/bash
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pkill -x nc
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while :; do
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nc -nkl 10088
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sleep 1
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done
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END
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```
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## 创建 log.html
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```html
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<!DOCTYPE html>
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<html>
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<head>
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<style>
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body{
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background-color: #0e1012;color: #ffffff;
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}
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*{
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margin: 0; padding: 0;
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}
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#msg{
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overflow:auto; border:2px solid #303030; color:#ffffff; background-color: #2b2b2b; font-size: 13px; position: absolute; left: 8px; right: 8px; bottom: 8px; top: 40px; word-break:
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break-all;
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}
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#log{
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position: fixed; top: 0; left: 0; width: 100%; height: 40px; text-align: left; margin: 4px 0 0 8px;
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}
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#log b{
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font-size: 26px;
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}
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#msgBtn{
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padding: 5px 10px; border: none; background: #777; float: right; margin: 0 16px 0 0;
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}
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</style>
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</head>
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<body>
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<div id="log"><span><b>实时日志</b></span><button id="msgBtn" type="button">清空</button></div>
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<div id="msg"><ul class="list"></ul></div>
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<script src="http://libs.baidu.com/jquery/1.9.1/jquery.min.js"></script>
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<script>
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$(document).ready(function() {
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if (!window.WebSocket) {
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if (window.MozWebSocket) {
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window.WebSocket = window.MozWebSocket;
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} else {
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$('#msg').append("<p>你的浏览器不支持websocket</p>");
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}
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}
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var ws = new WebSocket('ws://221.7.197.100:8008/websocket/');
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ws.onopen = function(evt) {
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$('.list').append('<li>websocket连接成功</li>');
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}
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ws.onmessage = function(evt) {
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$('.list').append('<li>' + evt.data + '</li>');
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setTimeout(function(){$('#msg').scrollTop($('.list').height()-$('#msg').height());}, 100)
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}
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$("#msgBtn").click(function(){
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$(".list").html("");
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})
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});
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</script>
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</body>
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</html>
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```
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## 文件部署位置
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```
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websocketd/
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├── [-rwxr-xr-x] cmd.sh
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├── [drwxr-xr-x] websocket
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│ └── [-rw-r--r--] log.html
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└── [-rwxr-xr-x] websocketd
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```
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## 启动 websocketd
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```bash
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cd websocketd
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./websocketd --port=8008 --staticdir=. ./cmd.sh
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```
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## 在浏览器中打开日志浏览页面
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- http://{websocket-server}:8008/websocket/log.html
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## 在其他应用服务器，传输实时日志
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```bash
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tail -f /tomcat/logs/catalina.out | nc -n {websocket-server} 10088
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```
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## 关闭实时日志
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- 在目标服务器中 kill nc
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```bash
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pkill -x nc
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```
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- 在 websocket server 中 kill nc
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```bash
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pkill -x nc
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```
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- 直接刷新浏览器的日志浏览页面
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